Mutavault [Grand Prix Promos] Zendikar Promos They have "Sacrifice this creature:

They have "Sacrifice this creature: Add {C}

Set: The List Type: Artifact Rarity: Uncommon Cost: {1} {T}: Exile the bottom card of target player's graveyard

−8: Search your library for any number of Dragon creature cards

Set: Dungeons & Dragons: Adventures in the Forgotten Realms Type: Creature — Spirit Knight Rarity: Rare Cost: {1}{W}{W} Flash

it becomes a Halfling Rogue with "Whenever this creature deals combat damage to a player

Mutavault [Grand Prix Promos] Zendikar Promos They have "Sacrifice this creature:Set: Grand Prix Promos Type: Land Rarity: Rare {T}: Add {C}. {1}: Mutavault becomes a 2 2 creature with all creature types until end of turn. It's still a land. Some worlds possess a hidden core where life's essence constantly surges.